{"id":18763469,"url":"https://github.com/fabiandev/java-validator","last_synced_at":"2025-12-06T02:30:11.716Z","repository":{"id":88027923,"uuid":"49584370","full_name":"fabiandev/java-validator","owner":"fabiandev","description":"A simple and extensible validation utility for 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java-validator\n\nA simple and extensible validation utility for Java.\n\n# Usage\n\n```java\nimport io.fabiandev.validator.contracts.Validator;\nimport io.fabiandev.validator.contracts.Bag;\nimport io.fabiandev.validator.core.StandardValidator;\n\nValidator validator = new StandardValidator(request);\n\nvalidator\n    .rule(\"email\", \"max:35|email\")\n    .rule(\"phone\", \"required_unless:email|min:9|digits\")\n        .message(\"phone.min\", \":field must be at least :min characters long.\")\n        .message(\"phone.digits\", \"For :field only digits are allowed\")\n    .rule(\"name\", \"required|min:6\")\n        .message(\"name.min\", \"Please fill in your name with at least :min characters.\")\n    .rule(\"tos_accepted\", \"required\")\n        .message(\"tos_accepted.required\", \"Please accept the Terms of Service.\");\n\nif (validator.fails()) {\n    System.out.println(\"There were errors!\");\n    Bag errorBag = validator.errors();\n    return;\n}\n\nSystem.out.println(\"Validation passed!\");\n```\n\n# Extending\n\nFind two basic examples of how to create custom rules below, and add them to the `RulesManage`\n\n```java\nimport io.fabiandev.validator.core.RulesManager;\n\nRulesManager.addRule(MyRule.class);\n```\n\n## Standard Rule\n\n```java\nimport io.fabiandev.validator.core.BaseRule;\n\npublic class MyRule extends BaseRule {\n\n  @Override\n    protected void validate() {\n    // Get the input field's value: this.inputField.getValue()\n    // Get all input fields: this.inputFields\n    // Get the rule parameter: this.ruleValue\n    // Call this.fail() if validation doesn't pass\n    }\n\n    @Override\n    protected String defaultMessage() {\n        return \":field can include :my_rule placeholders for the parameter.\";\n    }\n\n}\n```\n\n## Regex Rule\n\n```java\nimport io.fabiandev.validator.rules.Regex;\n\npublic class Everything extends Regex {\n\n    @Override\n    protected String regex() {\n        return \"^.*$\";\n    }\n\n    @Override\n    protected String defaultMessage() {\n        return \":field did not pass the everything rule.\";\n    }\n\n}\n```\n\n# Full Example\n\n```java\nimport io.fabiandev.validator.core.BaseRule;\n\npublic class ExactNumber extends BaseRule {\n\n  @Override\n    protected void validate() { \n      int expected = Integer.parseInt(this.ruleValue);\n      int actual = Integer.parseInt(this.inputField.getValue());\n      \n      if (actual != expected)\n      {\n          this.fail();\n      }\n    }\n\n    @Override\n    protected String defaultMessage() {\n        return \":field must contain the number :exact_number.\";\n    }\n\n}\n```\n\n```java\nimport io.fabiandev.validator.core.RulesManager;\n\nRulesManager.addRule(ExactNumber.class);\n```\n\n```java\nimport io.fabiandev.validator.contracts.Validator;\nimport io.fabiandev.validator.core.StandardValidator;\n\nValidator validator = new StandardValidator(data);\n\nvalidator\n    .rule(\"inputField\", \"exact_number:10|required\")\n    .messsage(\"inputField.exact_number\", \"Field ':field should' contain the number :exact_number.\")\n    \n\nvalidator.validate();\nvalidator.errors(); // contains \"Field 'inputField' should contain the number 10.\"\n\n```\n","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Ffabiandev%2Fjava-validator","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Ffabiandev%2Fjava-validator","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Ffabiandev%2Fjava-validator/lists"}